a = input()
j=1
for i in range(len(a) - 1):
    if a[i] == a[i+1]:
        j+=1
        if i==len(a) - 2:
            print(a[i], j, sep='',end='')
        continue
    elif i==len(a) - 2:
            print(a[i], j, a[i+1], 1, sep='',end='')
    else:
        print(a[i], j, sep='',end='')
        j=1